Ch-technology 121NQ045PbF Manuale Utente Scaricare il pdf (Pagina 5)

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Document Number: 94127

4 Revision: 25-Apr-08

121NQ045PbF

Vishay High Power Products

Schottky Rectifier, 120 A

Fig. 5 - Maximum Allowable Case Temperature vs.

Average Forward Current

Fig. 6 - Forward Power Loss Characteristics

Fig. 7 - Maximum Non-Repetitive Surge Current

Fig. 8 - Unclamped Inductive Test Circuit

Note

(1)

Formula used: T

= T

- (Pd + Pd

REV

) x R

thJC

;

Pd = Forward power loss = I

F(AV)

x V

at (I

F(AV)

/D) (see fig. 6);

REV

= Inverse power loss = V

x I

(1 - D); I

at V

= Rated V

F(AV)

- Average Forward Current (A)

Allowable Case Temperature (°C)

120

140

180

0 80 160 24040 120 200

160

Square wave (D = 0.50)

80 % rated V

applied

See note (1)

100

F(AV)

- Average Forward Current (A)

Average Power Loss (W)

0 20 40 60 80 100 120 180

120

140

RMS limit

D = 0.20

D = 0.25

D = 0.33

D = 0.50

D = 0.75

100

160

- Square Wave Pulse Duration (µs)

FSM

- Non-Repetitive Surge Current (A)

100

1000

10 000

1000

10 000

Current

monitor

High-speed

switch

D.U.T.

= 25 Ω

Freewheel

diode

= 25 V

IRFP460

40HFL40S02

1 2 3 4 5 6 7

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